Twitter (TWTR) is seeking a maximum valuation of $10.9 billion in its Wall Street debut, more modest than the $15 billion that some analysts had expected for the social media phenomenon. Factbox. No ... more&nbsp

Twitter (TWTR) is seeking a maximum valuation of $10.9 billion in its Wall Street debut, more modest than the $15 billion that some analysts had expected for the social media phenomenon. Factbox. No reporter narration. less&nbsp